*{
    margin: 0;
    padding: 0;
    list-style: none;
    
}
body{
    background: url(../img/banner4.jpg);
    background-position: 0px -285px;
    
}
.banner{
    height: 500px;
}
.banner1{
    background: url(../img/banner.jpg);
/*    让图片大小铺满整个屏幕*/
    background-size: cover;
}
.banner2{
    background: url(../img/banner2.jpg);
    background-size: cover;
}
.banner3{
    background: url(../img/banner3.jpg);
    background-size: cover;
}

/*响应式*/
@media (max-width:600px){
    .banner{
        height: 230px;
    }
    
}


.card .card-text{
    height: 30px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

footer{
    background: #fff;
    padding: 20px;
    
}
footer h6{
    font-size: 12px;
}
footer a{
    font-size: 12px;
}




/*上课讲的*/
/*
footer{
    background: #eee;
    padding-top: 70px;
    padding-bottom: 70px;
    font-size: 14px;
}
*/
